Pyke ult pinged cooldown bug

I was just playing in an ARAM game and found that Pyke's ult cooldown was acting really strangely. When I pinged it to my team, the ping said the ult was ready when it still had about 5 seconds cooldown on it. Also, after I had ulted twice and got two executes, the yellow bar around the pyke ult counted down normally but the ability icon was grayed out and reducing its cooldown even though I had a usable ult charge left. From what I can tell, I believe the issue is that the ping tracks an internal cooldown on Pyke's ult, registering it as ready when it is, but reducing its pinged cooldown when an ult charge is ready and counting its 20 seconds down. This issue was reproducible on Summoner's rift in a custom game, I had Ionian boots of Lucidity in both games, so I don't know if or how cooldown reduction affects this or not.